Cutting-tool.



UNITED STATES PATENT OFFICE.

CHARLES T. RIDG-ELY AND JOHN PFIEFER, OF SPRINGFIELD, OHIO,

ASSIGNORS TO THE STANDARD TRIMMER COMPANY, OF SPRING- FIELD, OHIO, ACORPORATION OHIO.

CUTTING-TOOL.

A Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed July 16,1906. Serial No. 326.394.

To all whom, t may concern:

Be it known that we, CHARLES T. RIDGELY and Jol-IN PFlEFER, citizens ofthe United States, residing at Springfield, in the county of Clark andState of Ohio, have invented certain new and useful Improvements inCutting- Tools, of which the following is a specification, referencebeing had therein to the accompanying drawings.

Our invention relates to cutting-tools of Referring to the accompanyingdrawings,.

Figure 1 is a plan view of a straight-edge with the cutting-toolattached. Fig. 2 is a front elevation of the tool mounted on thestraightedge. Fig. 3 is a transverse section of the same. Fig. 4 is arear elevation of the tool mounted on the straight-edge, and Fig. 5 is adetail view of the guide portion of the tool.

In carrying out our invention we employ a straight-edge 1 of any desiredconstruction,`

which is provided near one edge thereof with a groove 2 and has the edgeadjacent to that of said groove faced with a strip of brass or othersuitable material, the upper edge of said strip of brass being bent overat right angles to the strip to form a flange 4, which extends over theedge of the 'groove 2. Secured to the straight-edge on the opposite sideof thegroove is a plate of metal 5 or any suitable material, whichextends over the adjacent edge of the groove, forming a flange 6. Theflanges 4 and 6 extend over the slot 2 and form a substantially T-shapedguideway.

The guide portion 7 of the cutting-tool is struck from a single sheet ofmetal, such as brass, steel, or other suitable material. Near theopposite ends of the plate 8 are downwardly-extending lugs or ears 9,which are substantially flush with the plate 8 and adapted to engage themetal facing 3 of the straightedge 1 to form a lateral bearing-surfacefor the guide-plate. That portion of the plate lying between the lugs 9is bent at right angles to the main portion of the plate 8' to form aflange or rest 10, which is adapted to bear upon the upper surface ofthe straightedge and is provided at its opposite ends withoppositely-extending lips or ears 11i, struck from the body of theflange-and depressedto a lower level than the flange 1() to enable themto engage the opposite flanges 4 and 6 of the groove 2, thereby securingthe guide portion 7 of the cutter to the guideV on the straight-edge andallowing the same a free sliding movement thereon.

Near the middle portion of the flange 10 is a downwardly-bent lug 12,adapted to engage the outer flange 4 of the guide-groove to'provide anadditional guiding-surface and support. Near the ends of the plate 8ofthe guide member 7 are provided apertures or slots 13 and 14, andmidway between these slots a lip 15 is struck from the body of themember 7 and pressed to the outer side of the same to form a hook. Theextreme ends of the plate 8 are bent at an angle to formthe flanges 16.The body portion 17 of the toolholder is likewise struck from thesamepiece of metal and has its upperedge bent at substantially rightangles to the main portion thereof to form a cap or closure18for theupper edge of the tool-holder, one end of the flange 18 being of greaterwidth than the remainder of the cap or flange and bein shaped to form asupport 19 for'the ball of the thumb. At that end of the body portionopposite the thumb-support 19 the end of the plate is bent atsubstantially right angles thereto and shaped to form a finger-hold 20.Near the opposite ends of the plate 17 are struck up the hooks 21 and 22, the hook 21 being adapted to engage the slot 14 of the guide member 7and being free to slide therein forms a guide for the body portion ofthe tool-holder in its movement relatively to the guide member and alsoa stop to limit the motion thereof. The hook 22 is adapted toy engagethe aperture'13 of the guide member 7, and fitting loosely therein itforms a pivot about which the guide member is free to turn to a limitedextent, such movement being limited by the hook 21 in the slot 14.

Near the center ofthe plate 17 is a bearinglug 23, upon which is mountedthe cutting blade or disk 24, and that end of the plate 17 adjacent tothe thumbsupportl9is bentat IOO substantially right angles to the bodyportion and forms a flange 25.

ln assembling the cutter the cutting-blade or disk 24 is iirst mountedupon the bearing-- beneath the hook 22, where it projects be` yond theplate 8, and its middle portion above the hook or lip 15 on the guidemember, and the opposite end is pressed down and engaged beneath thehook 21 ofthe body portion, thereby forming a key which retains theparts in their assembled position and also providing a spring whichnormally holds the body portion in its elevated position and thecutter-blade above the bottom of the straight-edge and out of engagementwith the surface to be cut.

The flanges 16 on the guide member 7 and the flange 25 on the bodyportion serve to close the ends of the tool-holder and aflord additionalprotection to the cutting-blade and also to prevent the entrance of dustand dirt.

When the tool has been assembled in the manner described, the lips l1are engaged beneath the flanges 4 and 6 of the groove 2 and the lugs 9bear against the face 3 of the straight-edge, and the tool is thenoperated in the usual manner.

VVhile'we have particularly described ourV device, giving the detailconstruction and location of the various parts, we wish it to beunderstood that these may be greatly varied Without departing from thespirit of our invention and that we do not limit our invention to thedetails herein shown.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. In a cutting-tool of the character described, a guide member havingan aperture therein, a body portion having a lug struck therefrom andadapted to enter said aperture and form a pivot for said body portion,and a cutting-blade between said body portion and guide member,substantially as described.

2. A cutting-tool of the character described comprising ra guide memberhaving apertures therein, a body portion, lugs struck from said bodyportion and engaging said apertures, one of said lugs forming a pivotfor said body portion and the otherlug forming a guide for the same, anda cuttingblade confined between said guide member and said bodyportion,l substantially as described.

3. A cutting-tool of the character described comprising a guide memberhaving apertures therein, one of greater length than the other andforming a guideway, a body portion, lugs struck from said body portionand engaging said apertures, a spring for supporting said body portionin its elevated position, and a cutting-blade confined between saidguide member and said body portion, substantially as described.

4. A cutting-tool of the character described comprising a guide memberhaving apertures therein, a body portion having lugs adapted to engagesaid apertures, a cutits opposite ends engaging beneath the hooks onsaid body member, substantially as described..

6. In a cutting-tool of the character described, the combination, with astraightedge having a groove therein, and oppositelyextending llangesover the opposite edges of said groove, of a guide member comprisingdownwardly-extending portions adapted to engage the outer face of saidstraight-edge, a

horizontal portion, lips on said horizontal z portion adapted to engagebeneath said ilanges, a ,body member pivotally connected to said guidemember, and a cutting-blade secured between said members, substantiallyas described.

7. In a cutting-tool of the character described, the combination, with astraightedge having a groove therein and oppositelyfacing flangesextending over the edges of said groove, of a guide member comprising avertical portion engaging the face of said straight-edge, a horizontalportion engaging the upper surface of said straight-edge,oppositely-facing lips struck from said horizontal portion and engagingthe oppositely-facinO' flanges of said groove, a lug struck from saidhorizontal portion and bearing against one of said flanges, a bodymember pivotally connected to said guide member, and a cuttingbladeconfined between said members, substantially as described.

8. In a cutting-tool of the character described, the combination, with astraightedge having a groove therein and oppositelyfacing flangesextending over the edges of a spring having its central portion enlgaging thehook on said guide member and.

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said groove, of a guide `member comprising a vertical portion havingapertures therein, downwardly-extending portions in substantially thesame plane as said vertical portion and adapted to engage the face ofsaid straight-edge, a horizontal portion, lips struck from saidhorizontal portion and adapted to engage the flanges of said groove,inwardly-extending iianges at the opposite ends of said verticalportion, a body member, hooks struck from said body member and engagingthe apertures in said guide member, a bearing-lug carried by said bodymember, an inwardly-extending lange at the upper edge of said bodymember, thumb and linger supports thereon, a cutting-blade carried bysaid bearing-lug, and means for retaining said members in theirassembled position, substantially as described.

9. A cutting-tool of the character described comprising a guide memberhaving apertures near the opposite ends thereof, one

of said apertures being of greater length than i the other, vertical andhorizontal guides struck from said guide member, an upwardlyextendinghook between said apertures, a body member, inwardly-extending hooksstruck from said body member and engaging said apertures and extendingbeyond the face of said guide member, a cutting-blade mounted4 betweensaid members, and a resilient bar resting upon the upwardly-extendinghook of said guide member and having its ends coniined beneath theinwardlyextending hooks of said body member, substantially as described.

In testimony whereofwe a'iX our signatures in presence of two Witnesses.

' CHARLES T. RIDGELY.

JOHN PFIEFER.

Witnesses:`

E. O. HAGAN, F. W. SCHAEFER.

